Ean attachment foe



` RENTGEN 6L H'UMES.

Thrashing' Machine Fan. No; 31,825.- Patented fvlarcha'f-ismf ooooooooov' ooooooooop C 0 O O OGGI gL-J UNITED sTATEs PATENT OFFICE.

W. C. RENTGEN AND P. H. HUMES, OF KEOKUK, IOWA.

FAN ATTACHMENT FOR THRESHINGr-MACHINES.

Specification of Letters Patent No. 31,825, dated March 26, 1861.

To all 'whom it may concern:

Be it known that we, XV. C. RENTGEN and P. H. HUMES, both of Keolrulr, in the county of Lee and State of Iowa, have invented a new and useful Fan Attachment for Threshing-Machines; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure 1 is a side sectional view of our invention taken in the line a2, a', Fig. 2. Fig. 2 is a plan or top view of the same.

Similar letters of reference indicate correspending parts in the two figures.

The object of this invention is to prevent dust being blown from threshing-machines into the face of the feeder or attendantv while feeding the machine, a result due to the blast generated by the rotation of the it is ejected from the beater-box, and` force it in a direction from the feeder or attendant.

To enable those skilled in the arti to fully understand and construct our invention we l will proceed to describe it. A represents a fan-boxwh1ch is of cylindrical form and has two spouts a, Z), one of which a, is made either horizontal or slightlyV elevated or depressed, and the other Z), extends downward at the opposite side of the fan-box, as clearly shown in Fig. 1. The fan box is entirely closed at both ends so that the air which is driven out at the spout a is all drawn in at the spout b.

Within the fan-box A, there is placed a rotary fan B. This fan Inay be constructed in the usual way, to wit: radial arms c, being attached to a shaft CZ, and blades or winO's c', secured to the arms.

Tlie fan-box A, is placed directly over the cylinder or beater-box of a threshing-ma chine as shown in Fig. 1, the beater-box being represented in red. The spout b, projects down just over the feed entrance of the machine while the spout a', is directed toward the discharge end of the machine.

machine, will be drawn up into the fan-box A, and expelled therefrom through the spout a.

By this simple arrangement, therefore, the feeder 0r attendant will be fully protected from dust while feeding the machine. The device is extremely simple, may be constructed at a triiing expense, and applied to any of the threshing machines in use.

le are aware that a blast fan has been.

used for blowing away the dust from the feeding end of a threshing machine, but this is wholly different in its operation from the contrivance proposed by us. Nor do we claim broadly the use of a suction fan for the purpose contemplated, well knowing that suction fans of a complicated and inconvenient construction have heretofore been used by others; but

What we do claim as new and desire to secure by Letters Patent is- A fan arrangement consisting of a, fan placed in a proper case to which there is a suitable induction and eduction `passage the whole constituting a single trunk extending from the front to the rear of the machine and so arranged that the draft at the orifice of the induction passage shall be vertical or nearly so, all substantially in the manner above described.

W. C. RENTGEN. P. H. HUMES. 

